Nonaqueous electrolyte secondary battery
US10790512B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 18, 2016 |
| Grant date | Sep 29, 2020 |
| Priority date | — |
| Expiry date | Apr 23, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention is intended to provide a nonaqueous electrolyte secondary battery that is suppressed in generation of a gas and a micro short circuit of a negative electrode, while exhibiting an excellent rate characteristic. The present invention relates to a nonaqueous electrolyte secondary battery having a sealed body 70 that encloses a positive electrode 40, a nonaqueous electrolyte solution 60, a negative electrode 30, and a separator 50 formed of an electrically insulating material. The negative electrode 30 is formed by forming a negative electrode active material layer 21, which contains at least a negative electrode active material 12 and a negative electrode binder 11, on a current collector 22. The negative electrode active material 12 contains a titanium compound as a main component, the titanium compound having a particle diameter of 0.1 μm or more and 20.0 μm or less. The negative electrode binder 11 is an acid-modified PVdF obtained by introducing a carboxyl group into a polyvinylidene fluoride (PVdF). A negative electrode water content in the sealed body 70 is 400 ppm or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.